读取Excel工具类

package com.baiyz.utils;  
  
import lombok.extern.slf4j.Slf4j;  
import org.apache.poi.ss.usermodel.CellType;  
import org.apache.poi.xssf.usermodel.XSSFCell;  
import org.apache.poi.xssf.usermodel.XSSFRow;  
import org.apache.poi.xssf.usermodel.XSSFSheet;  
import org.apache.poi.xssf.usermodel.XSSFWorkbook;  
  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.FileNotFoundException;  
import java.util.LinkedHashMap;  
import java.util.LinkedList;  
import java.util.Map;  
  
/**  
 * <p> * Description: 读取Excel工具类  
 * </p >  
 * <p>PackageName: com.baiyz.utils</p > * <p>ClassName: ReadExcelUtils</p > * * @author <a href="mail to: byz0825@outlook.com" rel="nofollow">BaiYZ</a >  
 * @since 2022-09-16 10:09:38  
 */@Slf4j  
public class ReadExcelUtils {  
  
    /**  
     * 读取Excel工具类  
     * @param path 文件路径  
     * @param sheetName 表格名称  
     * @return 表格全部数据 LinkedList<Map<String, String>>  
     * @throws FileNotFoundException 未找到文件异常  
     */  
    private LinkedList<Map<String, String>> getExcel(String path, String sheetName) throws FileNotFoundException {  
        LinkedList<Map<String, String>> ans = null;  
        try(FileInputStream inputStream = new FileInputStream(new File(path))){  
            //存储整个结果  
            ans = new LinkedList<>();  
            XSSFWorkbook sheets = new XSSFWorkbook(inputStream);  
            XSSFSheet sheet = sheets.getSheet(sheetName);  
            //处理不存在sheet  
            if (sheet == null){  
                return new LinkedList<>();  
            }            XSSFRow titleRow = sheet.getRow(0);  
            for (int i = 1; i < sheet.getPhysicalNumberOfRows(); i++) {  
                //存储一行结果  
                LinkedHashMap<String, String> rowData = new LinkedHashMap<>();  
                XSSFRow row = sheet.getRow(i);  
                //读取格数  
                for (int j = 0; j < row.getPhysicalNumberOfCells(); j++) {  
                    XSSFCell cell = row.getCell(j);  
                    XSSFCell titleCell = titleRow.getCell(j);  
                    cell.setCellType(CellType.STRING);  
                    if(cell.getStringCellValue() .equals("")){  
                        continue;  
                    }                    rowData.put(getString(titleCell),getString(cell));  
                }                ans.add(rowData);  
            }  
        }catch (Exception e){  
            log.info("读取文件出现异常："+e);  
        }        return ans;  
    }    /**  
     * 把单元格的内容转为字符串  
     *  
     * @param xssfCell 单元格  
     * @return String  
     */    private static String getString(XSSFCell xssfCell) {  
        if (xssfCell == null) {  
            return "";  
        }        if (xssfCell.getCellType() == CellType.NUMERIC) {  
            return String.valueOf(xssfCell.getNumericCellValue());  
        } else if (xssfCell.getCellType() == CellType.BOOLEAN) {  
            return String.valueOf(xssfCell.getBooleanCellValue());  
        } else {  
            return xssfCell.getStringCellValue();  
        }    }}